K. Zhang
,
YQ. Wang
,
B.L. Zhou
,
YH. Zhou and H.L. Li (Institute of Metal Research
,
Chinese Academy of Scie11ces
,
Shenyang 110015
,
China International Center of Materials Physics
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China Dept. of Materials Science and Engineering
,
Northwestern Polytechnical University
,
Xi'an 710072
,
China)
金属学报(英文版)
The mechanical properties and deformation mechanisms of unidirectional carbon fiber reiopreed magnesium composites under tensile loading are studied. Two different materials are used as fiber coatings: a single silica and a gradient C/SiC/SiO2. The results show that, under the same preparation conditions, composite with the former coating is broken in a non-cumulative mode and its failure stress is rather low. Conversely, the latter coating demonstrates much better efficiency and the cormsponding composite is broken in a cumttlative mode.
关键词:
tensile properties
,
null
,
null
B. Yang
,
YQ. Wang
,
J. Zhang and B.L. Zhou (Institute of Metal Research
,
Chinese Academy of Sciellces
,
Shenyang 110015
,
China Nanchang University
,
Nanchang 330029
,
China International Center for Materials Physics
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China)
金属学报(英文版)
Some TiAl3 whiskers are found to be produced simultaneously during the formation process of TiB2 Particulates fabricated by in situ reaction in molten aluminum. The thec t of temperature of molten aluminum on the morphologies of the TiAl3 whiskers and the growth mechanism of the whiskers are studied in this paper. The results show that the aspect rutio of the TiAl3 whiskers decreases with the increase of the temperoture. The growth of the whiskers is proved to be controlled by a Vapor-LiquidSoltd (VLS) mechanism. The titanium and aluminum atoms in the catalytic droplet,however, have been coofrmed to react with each othen which is dtherent from other whlskcrs growing by a VLS mcchanism where the compostion in the catalytic droplet is a constant.
关键词:
in situ reaction
,
null
,
null
,
null
卿家胜
,
沈厚发
,
刘明
钢铁
doi:10.13228/j.boyuan.issn0449-749x.20160428
钒氮微合金化是高强耐候钢YQ450NQR1强化屈服强度的重要途径.钒氮微合金化对高强耐候钢YQ450NQR1性能的影响主要由钒和氮两部分构成,其中钒产生晶粒细化、析出强化的主要作用,氮强化钒的作用.通过高强耐候钢YQ450NQR1的钒氮积w(V)·w(N)研究,发现钒和氮质量分数的增加均可提高钢的屈服强度,同时钒和氮也呈乘积的方式对屈服强度产生影响.为保证高强耐候钢YQ450NQR1的屈服强度达到465 MPa,要求钒氮积w(V)·w(N)达到0.00144以上.为提高连铸坯的高温塑性,降低铸坯裂纹发生的敏感性,氮质量分数需控制为0.012%~0.014%.
关键词:
高强耐候钢
,
钒氮微合金化
,
钒氮积
,
屈服强度
刘庆春
,
钟华
,
郑之旺
钢铁钒钛
以含钒YQ450NQR1高强度耐候钢为研究对象,通过光学显微镜、高分辨率电镜、相分析等方法,研究了不同钒含量试验钢的金相组织、钒析出行为,探讨了钒析出量与力学性能之间的关系.结果表明,试验钢热轧态组织为块状铁素体+珠光体;钒在钢中明显析出,析出相以VN或V(C,N)为主; 钒在YQ450NQR1钢中起明显的强化作用,并且钒的作用与氮密切相关.只要获得了较高的VN析出比例,试验钢的钒含量可以得到降低.
关键词:
高强度耐候钢
,
钒
,
析出相
,
氮
,
组织
,
力学性能
由庆
,
王业飞
,
魏勇舟
,
吴鲁宁
,
赵福麟
腐蚀与防护
doi:10.3969/j.issn.1005-748X.2006.03.004
以棕榈酸、二乙烯三胺、马来酸酐为原料合成了一种咪唑啉型缓蚀剂YQ-01,与YQ-02复配后得到能有效抑制二氧化碳腐蚀的缓蚀体系YQ-03.应用静态挂片失重法、电化学极化曲线、X射线光电子能谱分析研究了YQ-03抑制二氧化碳腐蚀的电化学特征,分析了腐蚀前、后及加入缓蚀体系YQ-03后A3钢的表面产物,探讨了YQ-03的缓蚀机理.结果表明,由主剂YQ-01和助剂YQ-02组成的复配缓蚀体系有良好的协同作用,腐蚀产物膜有3层,能有效抑制饱和CO2的高矿化度盐水对A3钢的腐蚀.
关键词:
咪唑啉型缓蚀剂
,
二氧化碳腐蚀
,
复配体系
,
缓蚀机理
,
协同作用
辛爱渊
,
朱晓明
,
栾永幸
腐蚀学报（英文）
以棕榈酸、二乙烯三胺为原料合成了咪唑啉，并用顺丁烯二酸酐对其改性得到了咪唑啉型缓蚀剂YQ-01，与助剂YQ-02复配得到复配缓蚀体系YQ-03.应用静态挂片失重法、电化学法和扫描电镜法研究了该复配缓蚀体系YQ-03的缓蚀性能.结果表明，该复配缓蚀体系YQ-03对A3钢在饱和CO2盐水体系的腐蚀具有明显的抑制作用，适用于抑制高矿化度、含CO2的油田水腐蚀.
关键词:
咪唑啉型缓蚀剂
,
null
,
null
Journal of Materials Research
The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic glasses during ion milling.
关键词:
room-temperature
